Thaddeiys murphy



T.'MUBPHY. PROPELLING MECHANISM FOR VESSELS.

(Application filed June 8, 1898.)

No. 624,366. Patented may 2, I899.

(No Model.)

W/ TN E SSE S UNITED STATES. PATENT OFFICE.

THADDEUS MURPHY,'OF NEW YORK, N. Y.

PROPELLING MECHANISM FOR VESSELSf SPECIFICATION forming part of LettersPatent No. 624,366, dated May 2, 1899.

Serial No. 682,707. (No model.)

7 Application filed June 6, 1 898.

To all whom it may concern:

Be it known that I, THADDEUS MURPHY, of the city of New York, borough ofManhattan, in the county and State of New York, have invented certainnew and useful Improvements in Marine Vessels, of which the follow ingis a full, clear, and exact description.

The object of the invention is to provide certain new and usefulimprovements in marine vessels with a view of insuring proper propulsionand of utilizing the motive power to the fullest advantage, so that thepropeller is capable of acting with great force on the water to propelthe vessel at a very high rate of speed.

The invention consists of novel features and parts and combinations ofthe same, as will be fullydescribed hereinafter and then pointed out inthe claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of the improvement. Fig. 2 is an invertedplan view of the same, and Fig. 3 is a transverse section of the same onthe line 3 3 of Fig. 1.

The hull A of the marine vessel is formed with two parallel keelsl3,extendinglongitudinally from the overhanging stern C to the sides ofthe bow D, as is plainly indicated in the drawings. The two keels B areextended up into the interior of the hull A and connect with each otherat the middle portion B of the hull A, as is plainly indicated in Fig;3, to produce a U-shaped longitudinal channel E, reaching from the bowof the vessel to the each extending for a full revolution around theshaft, as is plainly indicated in the drawings, the forward blade Fbeing within the rear portion of the parallel keels B,.while the rearblade F is under the overhanging stern O and terminates near therudder-frame G, in which the rear end of the shaft F is journaled, asindicated in Figs. 1 and 2. The channel E is of such a depth that thelower ends of the blades F are within the keels, and consequently thepropeller-blade is not liable to be injured on the keels passing oversandy bottoms, obstructions, or the like. The forward end of the shaft Fis journaled in a suitable bearing F and on the shaft, between the endsof the blades F F is secured a bevel gear-wheel H, in mesh with a bevelgear-wheel H, attached to the lower end of a shaft H extendingvertically and journaled in a suitable bearing F attached to-the middleor connecting portion B between the keels B, said bearing F also forminga bearing for the middle portion of the shaft F.

On the upper end of the shaft H is secured a bevel gear-wheel H in meshwith a bevel gear-wheel H on the main or driving shaft I, arrangedwithin the hull A and driven from a suitable engine or other motor. Whenthe shaft I is set in motion, a rotary motion is given to the shaft F ofthe propeller F, so that the blades F F work in the water, passingthrough the channel E in anger fashion, and as the propeller-blade Fworks in the body of water, completely filling said channel, it isevident that a very high rate of speed is obtained without waste ofpower by a large amount of slip or the like, as is the case with marinevessels heretofore constructed. By connecting the driving-shaft I withthe pro peller-shaft, near the middle of the latter, by gearing it isevident that less power is required to drive the propeller, as thefriction or resistance is reduced to a minimum.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- I A marine vessel, having two keels locatedparallel with each other and one on each side of the longitudinal centerof the vessel, the keels being extended upward into the hull of thevessel and being converged to connect with each other so as to form acavity in the bottom of the hull, a rotary shaft located longitudinallyin said cavity, a bearing for each end of the shaft, propellerbladesattached to tached to the third bearing and meshing with 1th: shaf'i a;getzilwheeil ztmjilaltachid todtgetshaft the gear-wheel of the shaft. a

1n erme 1a.- 8 O 6611 S GI'QO an e Ween the propeller-blades, a thirdbearing holding THADDEUS MURPHY 5 the intermediate portion of the shaftand at- Witnesses:

tached to the hull of the Vessel, a shaft monnt- THEO. G. HOSTER,

ed in said third bearing, and a gear-wheel at- EVERARD BOLTON MARSHALL.

